Approval of American Society of Mechanical Engineers Unconditioned Code Cases
other · Nuclear Regulatory Commission · Published 2026-01-27 · Effective 2026-01-26 · 91 FR 3359
Document
Document number
2026-01494
Federal Register citation
91 FR 3359
CFR reference
10 CFR 50
Type
Rule
Action
Direct final rule; confirmation of effective date.
Category
other
Sub-agency
Nuclear Regulatory Commission
Publication date
2026-01-27
Effective date
2026-01-26
Energy docket
NRC-2024-0163
Abstract
The U.S. Nuclear Regulatory Commission (NRC) is confirming the effective date of January 26, 2026, for the direct final rule that was published in the Federal Register on September 26, 2025. This direct final rule amended the regulations to incorporate by reference a regulatory guide that approved unconditioned code cases published by the American Society of Mechanical Engineers. This action allows nuclear power plant applicants and licensees to use the code cases as voluntary alternatives to engineering standards for nuclear power plant components.